Improvement in door-latches



WILLIAM H. MOTT.

Improvement in DoQr-Latchesummm: 1

llll

@ttumegm UNITED STATES WILLIAM H. MOTT, OF NEW YORK, N. Y.

IMPROVEMENT IN DOOR-LATCHES.

Specification forming part of Letters Patent No. 127,505, dated June 4,1872.

Specification describing an Improvement in Double-Head Latch-Locks,invented by WIL- LIAM H. MoTT, of the city, county, and State of NewYork.

rlhe invention consists in lapping and slotted latches having pins andshoulders, a lever having holes and peculiar surface, and a double wirespring, combined, as described, with lock-case and plate, all ashereinafter described.

In the accompanying drawing, Figure l represents an inside view of thelock, the covering-plate being removed to show the arrangement of thelatches, lever, and springs. Fig. 2 is a cross-sectionv of Fig. l, takenon the line Similar letters of reference indicate corresponding parts.

A and B are the latch-bolts. D is the double spring. The latches aremade to lap onto each other, as seen in the cross-section. The interiorportion of each latch-bolt has a slot, z'. The slots receive aguide-lug, O, (seen in dotted 1ines,) cast on the case, by which thelatch-bolts are kept in place as they `move out or in. Each latch has apin, j', which" eceives the lever G. The latter has holes, as's en at gh, which a1- low it to be placed loosely on the projecting pins, whereit is held by the plate I by means of a single screw passing through theplate and entering the screw-hole J of the case. k represents a shoulderon each of the latch- C is the lever.

. bolts, against which the springs D work. As

E is the lockcase.l

Fig. l. Any kind of `springs may be used for this purpose. The springbears against the latch-bolts with a constant pressure. Lis thekey-hole.

In throwing back the latch-bolt A the bit77 of the key bears against thelever C on the surface m, This causes the lever to turn on the pin fatIva as on a pivot, and, consequently, moves back the hole g, whichthrows the latch A. In throwing the other latch, B, the key enters therecess N, causing the lever to turn on the pin f at g and thereby drawback the latch-bolt B. It will be seen that the hole IL in the lever isslotted, which gives all the play necessary on the pin f to allow thelever to turn, as described.

In this lock the latch-bolts are connected by the lever, so that neitherbolt would Work without the other; but in operating one the other is notdisturbed.

It will be seen that the lock may be placed l Witnesses:

GEO. W. MABEE, T. B. MosHER.

